Abstract
The resonant substructures of decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of of collisions collected by the LHCb detector is used. The branching fraction of the decay in the region is measured to be , where the first uncertainty is statistical, the second is systematic and the last arises from the normalization channel . The S-wave components are modeled with the isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at is confirmed and its spin-parity is determined for the first time as . The branching fraction, mass and width of this structure are determined together with those of the and resonances. The branching fractions of other decay components with are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays , , , and the first evidence of are presented.
10 More- Received 8 May 2015
DOI:https://doi.org/10.1103/PhysRevD.92.032002
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© 2015 CERN, for the LHCb Collaboration